Great design! For anyone reading this that also encountered a high pitched sound, clipping of the top mm or two from the part that goes into the fan gets rid of the noise. I suspect the fins where hitting the inserted part.

The printing worked out fine and it fitted perfect to the nozzle fan on my Anet A8 printer, but while it is pretty big it hit one of my projects and it got of. Nothing was damaged, but after this accident I decided to use a different nozzle fan. Thanks anyway for the great design.

I only have one problem with the coupling between the fan duct and the blower. It tent to loose. is there any chance to change the coupling with one like the one on this design https://www.thingiverse.com/thing:1954001

Just printed this and will say that it is great. Used the semi circular before this as i was told that it performed better but on my printer it surely does not. Amazed how well the air pushes out of this

Friggin awesome design. However, like the original shroud, it makes the fan squeal like an air raid siren. I ended up clipping the left wall off of the part that goes into the fan and it significantly reduced the noise, as well as improved airflow.

Can someone explain to me how this is supposed to work? I "inherited" an Anet A8 with this part already installed. My common sense tells me, that this part shouldn't really work. Simple scenario: have two people try to blow out a candle from opposing (180deg) directions. The wind from blowing cancels each other out (if both blow about equally, at equal distance away), and the candle doesn't go out. Remove a person, and it works perfectly. Thus, blowing cold air should really happen from one side only. Since I've never been able to try that out with my printer, does that cause issues with the hot filament being blown all over? (BTW, the ring works well when air is sucked out of it, as that creates a vacuum in the middle which is always unstable and ends up sucking the particles out of the way, which is why it works on a CNC machine)

It works because you're applying something that is true (to blow out a candle, you need to push the flame away from the wick, which you can't do it something else is pushing back) to a situation in which it does not apply.

In the case of cooling, what you want is air to pass on/over/around your part, you don't need the part to move... in the case of this duct, what you have is a bunch of ducts pointing down-ish towards a spot. the air won't cross-flow since air of coming from around the direction it's being pushed towards (i.e. towards another duct outlet, although since they kind of point downwards, they aren't truly facing each other) but the air has a ton of places to go, around the part and down for one, and up around the extruder nozzle too.

the air might not be able to move in one specific direction, but it'll move everywhere (except towards those outlets) and that is good enough to cool a part. Especially if you want to cool the front AND the back AND the sides, depending on which way the extruder is leaving the hot plastic.

one a little side note: since there's so much resistance for the air to reach the far side of the ring, it becomes very directional again. So you may as well just blow all the air from one side again. Any one with practical experience?

The v2 works good! Maybe a bit TOO good. Drops my nozzle temps about -20 Celsius (want to keep the nozzle around 223, it is 203 when the fan kicks on). All wires are solidly plugged in, anyone else have this issue?!

I have Anet A8 (bought Mar-2017) and printed part does not fit on the fan hole. My fan hole is 17x12,5mm but printed nozzle is 16,5x13mm so it does not fit. I checked dimensions on the models vs printed and seems OK. Maybe our fans are a little different....
I lost time and material but we are learning so don't worry ;)

Why does this say "Centered" when it's left-shifted like all the old Anet nozzles? Label this noise correctly! Some of us have blowers in the correct position. The last one I looked at that said "centered" was right-shifted. WTF people?

for the few of us with the warping, perhaps if there was a sort of spine/ridge along the top of the ring that ran back to the rectangular duct? and also perhaps either have no gap or have the gap opposite the duct.

Hey, i experienced the same with the new Cura version. i have set a wall with 1.2mm thickness with a 0.4mm nozzle on my A8 - when i change the wall size to 0.39 it works fine for me.. maybe a little workaround but i will try to fix this in a while!

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